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extern crate languageserver_types as ls_types; | |
pub trait Request { | |
type Param; | |
type Result; | |
// Has to be a method as associated constants are unstable | |
fn method(&self) -> &'static str; | |
} | |
struct RequestStruct<Params> { | |
id: ls_types::NumberOrString, | |
params: Params | |
} | |
impl Request for ls_types::ShowMessageRequestParams> { | |
type Param = ls_types::ShowMessageRequestParams; | |
type Result = ls_types::MessageActionItem; | |
fn method(&self) -> &'static str { ls_types::REQUEST__ShowMessageRequest } | |
} | |
// Example separated request handling logic | |
trait RequestHandler<R: Request> { | |
fn handle(&self, request: RequestStruct<R>) -> R::Result; | |
} | |
struct MyHandler; | |
impl RequestHandler<ShowMessageRequest> for MyHandler { | |
fn handle(&self, request: RequestStruct<ShowMessageRequest>) -> ls_types::MessageActionItem { | |
eprintln!("Handling ShowMessageRequest"); | |
ls_types::MessageActionItem { title: String::from("dummy") } | |
} | |
} | |
fn main() { | |
let handler = MyHandler; | |
let request = ShowMessageRequest { | |
id: ls_types::NumberOrString::Number(1), | |
params: ls_types::ShowMessageRequestParams { | |
typ: ls_types::MessageType::Info, | |
message: String::from("Hello!"), | |
actions: None | |
} | |
}; | |
handler.handle(request); | |
type MyRequest = RequestStruct<String>; | |
let request = MyRequest { | |
id: ls_types::NumberOrString::Number(1), | |
params: String::from("dummy") | |
}; | |
// handler.handle(request); //ERROR: trait bound is not satisfied | |
} |
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